A feathered dinosaur highlights gaps in our understanding of paravian wing evolution. Its wing structure shows evidence of an irregular molt, indicating flightlessness and demonstrating the complexity...

A new genus and species of podocnemidid turtle, Shakiremys colombiana, is described here from the Middle Miocene La Venta Biome, located in south-central Colombia. The new taxon is represented by two....

A newly discovered Triassic fossil marine reptile, Lijiangosaurus yongshengensis, reveals that an exceptionally long neck developing more than 40 cervical vertebrae evolved in nothosaurs before the ri...

Abstract. The morphological transformation of a highly mobile, grasping forelimb into a flapping wing is a key transition in the evolution of bird flight.

A new genus and species of Cretaceous bird from Antarctica with implications for the early evolution of Neornithes is described here. The type specime…

ABSTRACT: Additional historical data regarding the original finding and excavation (circa 1958-1959) of the Miragaia longicollum stegosaur MG 4863 has been identified (including field notes and the complete field map), allowing a better understanding of its stratigraphic context. Additionally, osteological material that was previously partially encased in matrix was fully prepared and restored, including anterior and posterior caudal vertebrae, metacarpals, and five semi-complete dorsal vertebrae (the latter being the most significant addition, as these are the only skeletal elements shared by all type specimens of dacentrurine taxa). New anatomical information from these additional elements provides further evidence that M. longicollum is distinct from the closely related Late Jurassic stegosaur Dacentrurus armatus from England (demonstrated mainly by various caudal differences). The newly prepared material further completes what was already the best reference specimen among the Dacentrurinae clade, as well as Stegosauria in Europe during the Late Jurassic, increasing its value to better understand these contexts in future studies.

Abstract. Dyrosauridae are a clade of crocodyliforms characterized by diverse cranial morphologies and a broad palaeogeographic distribution from the Late

Nature - Nanotyrannus and Tyrannosaurus coexisted at the close of the Cretaceous

Athenar bermani, a new species of dicraeosaurid sauropod from Dinosaur National Monument, Utah, U.S.A.